Display device with touch sensor and method of manufacturing same

ABSTRACT

An aspect of the present disclosure may provide a display device including: a light-emitting layer including a plurality of light-emitting areas; a plurality of touch wiring lines arranged in a first direction so as to overlap the light-emitting area; and a touch electrode formed on the plurality of touch wiring lines. Further, a method of manufacturing the display device may be provided.

CROSS REFERENCE TO RELATED APPLICATION

This application claims priority from Korean Patent Application No.10-2017-0144328, filed on Oct. 31, 2017, which is hereby incorporated byreference in its entirety for all purposes as if fully set forth herein.

BACKGROUND Field of the Disclosure

The present disclosure relates to a display device including a touchsensor and a method for manufacturing the display device.

Description of the Background

Demand for display devices for displaying an image has been increasingin various forms, and various types of display devices, such as a LiquidCrystal Display (LCD) device, a plasma display device, and an OrganicLight Emitting Diode (OLED) display device, have been utilized.

Among the above display devices, the OLED display device, which is aself-luminous device, has been recently spotlighted because it isexcellent in viewing angle, response speed, and color reproducibility,and can be implemented to have a thin profile.

In addition, a display device may operate by receiving a user's commandinput through various input devices such as a key board or a mouse, andis being developed as an input device of a touch panel display device,which enables a user's command to be intuitively and conveniently inputby touching a screen of a display device. The touch panel may bedisposed on the screen of the display device, and the display device mayreceive the input of a user's command when the user touches a specificpoint on the screen of the display device. Since the touch panel sensestouch coordinates, it may be called a touch sensor unit.

The above-described display device may be configured such that the touchpanel is mounted thereon. When the touch panel is mounted on the displaydevice, the distance between the wiring of the touch panel and thewiring in the display device is reduced, which increases the magnitudeof a parasitic capacitance between the touch panel and the displaydevice becomes large, thereby increasing power consumption.

In addition, the display device includes a display area in which animage is displayed and a bezel area, which is located outside thedisplay area. Recently, attempts are being taken to reduce the width ofthe bezel area in consideration of design or the like. However, when thetouch panel is mounted on the display device, it is necessary totransmit touch signals, which may cause the number of signalstransmitted to the display device to further increase. In addition,there is a limit in reducing the width of the bezel region by wiring foroutputting a large number of signals to the outside.

SUMMARY

Accordingly, the present disclosure is to provide a display deviceincluding a touch sensor that may enable implementation of a thin bezel,and a method of manufacturing the display device.

Another aspect of the present disclosure is to provide a display deviceincluding a touch sensor which may enable reduction of powerconsumption, and a method of manufacturing the display device.

In one aspect, the present disclosure may provide a display deviceincluding: a light-emitting layer including a plurality oflight-emitting areas; a plurality of touch wiring lines arranged in afirst direction so as to overlap the light-emitting area; and a touchelectrode formed on the plurality of touch wiring lines.

In another aspect, the present disclosure may provide a display deviceincluding: a light-emitting layer including a plurality oflight-emitting areas and a non-light-emitting area disposed between thelight-emitting areas; a plurality of touch wiring lines arranged on thelight emitting layer to be connected to the non-light-emitting area; anda touch electrode disposed on at least one of the plurality of touchwiring lines.

In yet another aspect, the present disclosure may provide a method ofmanufacturing a display device. The method includes: forming a pluralityof data lines and a plurality of gate lines intersecting each other suchthat the plurality of data lines or the plurality of gate lines arearranged in a first direction; disposing a plurality of touch wiringlines on the data lines and the gate lines in such a manner that, amongthe plurality of touch wiring lines, at least one touch wiring line isdisposed in the first direction between two adjacent data lines orbetween two adjacent gate lines; and disposing a touch electrode formedon at least one touch wiring line among the plurality of touch wiringlines.

According to the present disclosure, it is possible to provide a displaydevice in which a thin bezel is capable of being implemented, and amethod of manufacturing the display device.

Further, according to the present disclosure, it is possible to providea display device, which is capable of being mounted with a touch sensorunit and capable of reducing power consumption, and a method ofmanufacturing the display device.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of the presentdisclosure will be more apparent from the following detailed descriptiontaken in conjunction with the accompanying drawings, in which:

FIG. 1 is a structural view illustrating a display device according toaspects of the present disclosure;

FIG. 2 is a circuit diagram illustrating a pixel according to aspects ofthe present disclosure;

FIG. 3 is a plan view illustrating a touch sensor unit according toaspects of the present disclosure;

FIG. 4 is a plan view illustrating a touch sensor unit according toaspects of the present disclosure;

FIG. 5 is a cross-sectional view illustrating a cross-section of adisplay device according to aspects of the present disclosure;

FIG. 6A is a conceptual view illustrating an arrangement of apertureareas and data lines in a display device according to aspects of thepresent disclosure;

FIG. 6B is a cross-sectional view illustrating a cross-section takenalong line A-A′ in FIG. 6A;

FIG. 7A is a conceptual view illustrating an arrangement of touch wiringlines disposed on a sealing substrate in a display device according toaspects of the present disclosure;

FIG. 7B is a cross-sectional view illustrating a cross-section takenalong line A-A′ in FIG. 7A;

FIG. 8A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure;

FIG. 8B is a cross-sectional view illustrating a cross-section takenalong line A-A′ in FIG. 8A;

FIG. 9A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure;

FIG. 9B is a cross-sectional view illustrating a cross-section takenalong line A-A′ in FIG. 9A;

FIG. 10A is a conceptual view illustrating an arrangement of touchwiring lines disposed on a sealing substrate in a display deviceaccording to aspects of the present disclosure;

FIG. 10B is a cross-sectional view illustrating a cross section takenalong line A-A′ in FIG. 10A;

FIG. 11A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure;

FIG. 11B is a cross-sectional view illustrating a cross section takenalong line A-A′ in FIG. 11A;

FIG. 12A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure;

FIG. 12B is a cross-sectional view illustrating a cross-section takenalong line A-A′ in FIG. 12A; and

FIG. 13 is a flowchart illustrating method of manufacturing a displaydevice according to aspects of the present disclosure.

DETAILED DESCRIPTION

Hereinafter, some aspects of the present disclosure will be described indetail with reference to the accompanying illustrative drawings. Indesignating elements of the drawings by reference numerals, the sameelements will be designated by the same reference numerals although theyare shown in different drawings. Further, in the following descriptionof the present disclosure, a detailed description of known functions andconfigurations incorporated herein will be omitted when it may make thesubject matter of the present disclosure rather unclear.

In addition, terms, such as first, second, A, B, (a), (b) or the likemay be used herein when describing components of the present disclosure.Each of these terminologies is not used to define an essence, order orsequence of a corresponding component but used merely to distinguish thecorresponding component from other component(s). In the case that it isdescribed that a certain structural element “is connected to”, “iscoupled to”, or “is in contact with” another structural element, itshould be interpreted that another structural element may “be connectedto”, “be coupled to”, or “be in contact with” the structural elements aswell as that the certain structural element is directly connected to oris in direct contact with another structural element.

FIG. 1 is a structural view illustrating a display device according toaspects of the present disclosure.

Referring to FIG. 1, a display device 100 may include a display panel110, a touch sensor unit 120, a display driver 140 a, a touch driver 140b, and a controller 150.

The display panel 110 may include a plurality of pixels 101 arranged ina matrix form. Each pixel 101 may include an OLED and a pixel circuit(not illustrated) for supplying a driving current to the organic lightemitting diode OLED. The pixel circuit may receive a data signal inresponse to a gate signal so as to generate a driving current, and maysupply the driving current to the organic light emitting diode OLED. Inaddition, the display panel 110 may be driven by receiving a pluralityof voltages. The plurality of voltages transmitted to the display panel110 may include a first voltage EVDD and a second voltage EVSS having avoltage level lower than that of the first voltage EVDD. The displaypanel 110 may be configured such that a driving current flows therein bythe first voltage EVDD and the second voltage EVSS. The first voltageEVDD may be supplied for each pixel column and the second voltage EVSSmay be a common voltage supplied to the plurality of pixels 101 incommon.

The touch sensor unit 120 may be disposed on the display panel 110 andmay sense a touch of a user's stylus pen. Here, the touch does not onlymean a direct touch, but may include approaching at a predeterminedinterval.

The display driver 140 a may transmit a gate signal and a data signal tothe display panel 110. The display driver 140 a may receive an imagesignal so as to generate a data signal. Here, it is illustrated that thenumber of display drivers 140 a is one, but the present disclosure isnot limited thereto. The number of display drivers 140 a may bedetermined depending on the size or resolution of the display panel 110.The display driver 140 a may be implemented as an integrated circuit.

The touch driver 140 b may transmit a touch driving signal to the touchsensor unit 120 and may receive a touch sensing signal in response tothe touch driving signal. The touch driver 140 b may be implemented asan integrated circuit.

The controller 150 may control each of the display driver 140 a and thetouch driver 140 b. In addition, the controller 150 may supply an imagesignal to the display driver 140 a.

FIG. 2 is a circuit diagram illustrating a pixel according to aspects ofthe present disclosure.

Referring to FIG. 2, the pixel 101 may include a pixel circuit includingan OLED, first to third transistors T1 to T3, and a capacitor C1. Here,the first transistor T1 may be a driving transistor that drives adriving current flowing in the OLED.

The first transistor T1 may have a first electrode connected to a firstvoltage line VL1 to receive the first voltage EVDD, a second electrodeconnected to a second node N2, and a gate electrode connected to a firstnode N1. In addition, the second transistor T2 may have a firstelectrode connected to a data line DL, a second electrode connected tothe first node N1, and a gate electrode connected to a gate line GL. Thethird transistor T3 may have a first electrode connected to the secondnode N2, a second electrode connected to a second voltage line VL2, anda third electrode connected to a sensing control signal line SEL. Here,the sensing control signal line SEL may be a gate line GL. The gate lineGL and the data line DL may intersect each other.

The OLED may have an anode electrode connected to the second node N2 anda cathode electrode, to which a second voltage EVSS may be transmitted.The cathode electrode may be connected to the second voltage line.Therefore, the driving current supplied through the first transistor T1may flow in the OLED. In addition, a capacitor C1 may be connectedbetween the first node N1 and the second node N2 and may maintain avoltage applied to the first node N1. The first voltage line VL1 mayreceive the first voltage EVDD and the second voltage line VL2 mayreceive a reference voltage Vref.

FIG. 3 is a plan view illustrating a touch sensor unit according toaspects of the present disclosure.

Referring to FIG. 3, the touch sensor unit may be disposed on thedisplay panel 110, and may include a plurality of first electrodes TEaand a plurality of second electrodes TEb. The plurality of firstelectrodes TEa may correspond to touch driving electrodes TE1 a and theplurality of second electrodes TEb may correspond to touch sensingelectrodes TEb. The plurality of first electrodes TEa may be connectedin the horizontal direction by connection portions 322 so as to form aplurality of electrode rows, and the plurality of second electrodes TEbmay be connected in the vertical direction by the connection portions322 so as to form a plurality of electrode columns. Here, the pluralityof first electrodes TEa and the plurality of second electrodes TEb areillustrated as being arranged in a 4×3 form, but the present disclosureis not limited thereto.

The first electrodes TEa may receive a touch driving signal, and thesecond electrodes TEb may transmit a touch sensing signal thatcorresponds to the touch driving signal. The first electrodes TEa andthe second electrodes TEb may be formed on the same layer on the displaypanel 110. However, the present disclosure is not limited thereto.

Each connection portion 322 may be configured to connect one firstelectrode TEa to other first electrodes. In addition, the connectionportion 322 may be configured to connect one second electrode TEb toother second electrodes. The connection portions 322 intersect eachother. In order to ensure that the first electrodes TEa and the secondelectrodes TEb are not directly connected to each other, the connectionportions 322 that connect the first electrodes TEa to each other, may beformed in a layer that is different from a layer where the firstelectrodes TEa and the second electrodes TEb are formed, and the firstelectrodes TEa and the connection portions 322 may be connected to eachother through vias. The connection portions 322 that connect the secondelectrodes TEb to each other may be formed in a layer that is the sameas the layer where the first electrodes TEa and the second electrodesTEb are formed, so that the second electrodes TEb can be connected inthe same layer. Accordingly, an insulating film (not illustrated) may bedisposed between the connection portions 322 that connect the firstelectrodes TEa and the connection portions 322 that connect the secondelectrodes TEb.

In addition, the first electrodes TEa and the second electrodes TEb maybe formed by patterning a conductive metallic layer. In addition, thefirst electrodes TEa and the second electrodes TEb may be formed of atransparent material, such as Indium Tin Oxide (ITO). In addition, thepatterned first electrodes TEa and second electrodes TEb may include anelectrode pattern formed in the form of a mesh, and the first electrodesTEa and the second electrodes TEb may include a plurality of openings.Light, which is emitted from the display device through the firstelectrodes TEa and the second electrodes TEb made of the ITO electrodesor the plurality of openings included in the first electrodes TEa andthe second electrodes TEb, may be transmitted through the firstelectrodes TEa and the second electrodes TEb, or may be emitted to theoutside through the plurality of openings. The patterns of the firstelectrodes TEa and the second electrodes TEb formed in the form of amesh may be referred to as touch electrode lines. In addition, the firstelectrodes TEa and the second electrodes TEb may be connected to drivinglines 321 a and 321 b that cause a driving signal, which drives thefirst electrodes TEa and the second electrodes TEb, to be applied to atouch electrode, and sensing lines 321 c that cause a sensing signal,which is generated in response to a touch sensed by the touch electrode,to be transmitted.

In the touch sensor unit described above, the driving lines 321 a and321 b that apply a signal to the first touch electrodes TEa may bedisposed on the left and right sides of the display panel 110, and thesensing lines 321 c may be disposed on the lower side of the displaypanel 110. As a result, there is a problem in that the width of thebezel area, which may be formed on the left and right sides of thedisplay panel 110, is increased.

FIG. 4 is a plan view illustrating a touch sensor unit according toaspects of the present disclosure.

Referring to FIG. 4, the touch sensor unit may be disposed on thedisplay panel 110, and a plurality of touch electrodes TE, each having apredetermined area, may be arranged in a matrix form on the displaypanel 110. In addition, a plurality of touch wiring lines 420 may beconnected to the touch electrodes TE so as to receive a touch sensingsignal from the touch electrodes TE, respectively. The touch wirings 520are disposed under the touch electrodes and may be in contact with aregion of the touch electrodes TE. The touch electrodes TE and the touchwirings 420 may be mounted in the display panel 110, and as a result,when the display device 110 is made not to include a separate touchpanel on the display panel 110, the display panel 110 may be implementedto be thinner.

Unlike the touch sensor unit illustrated in FIG. 4, the touch sensorunit may have touch wiring lines, to which a touch signal istransmitted, on the lower side of the display panel 110, without havingdriving lines formed on the left and right sides of the display panel110. Therefore, since no signal wiring is formed on the left and rightsides of the display panel 110, there is no problem that the bezel areason the right and left sides of the display panel 110 are increased.

FIG. 5 is a cross-sectional view illustrating a cross-section of adisplay device according to aspects of the present disclosure.

Referring to FIG. 5, the display device 100 may include a display panel110 that includes a substrate 110 b on which a back plate 110 a, a gateline, a data line, and a transistor are disposed, and a light-emittinglayer 110 c including an OLED and disposed on the substrate 110 b, and asealing substrate 110 d sealing the light emitting layer 110 c and asealing substrate 110 d sealing the light-emitting layer 110 c, and atouch sensor unit 120 a disposed on the sealing substrate 110 d. A coverglass 110 e may be disposed on the touch sensor unit 120 a on thedisplay panel 110. The light-emitting layer 110 c may include a nodeelectrode, a cathode electrode, and an organic light-emitting filmdisposed between the anode electrode and the cathode electrode. Thestructure of the display device 100 is not limited thereto.

The display panel 110 operates in such a manner that an operation periodthereof is divided into a display period and a touch sensing period. Inthe display period, the display panel 110 is driven to display an image,and in the touch sensing period, the touch sensor unit 120 is operatedsuch that a touch position can be detected. The touch sensor unit 120may be driven in a self-capping manner during the touch sensing period.The self-capping method may be a method of sensing a touch using aparasitic capacitance CP1, which is formed between a stylus pen and thetouch sensor unit 120 and is generated when a user touches the coverglass 110 e using the stylus pen.

In addition, in the touch sensing period, the light-emitting layer 110 ddisposed under the touch sensor unit 120 a may include a conductor andmay maintain a constant voltage. Accordingly, a parasitic capacitanceCP2 may be formed between the touch sensor unit 120 a and the lightemitting layer 110 d in the self-capping method.

The power consumption may be increased by the parasitic capacitance CP2formed between the touch sensor unit 120 and the light emitting layer110 d. In addition, the touch sensing may be made inaccurate due to theparasitic capacitance CP2. Therefore, it is necessary to reduce themagnitude of the parasitic capacitance CP2.

FIG. 6A is a conceptual view illustrating an arrangement of apertureareas and data lines in a display device according to aspects of thepresent disclosure, and FIG. 6B is a cross-sectional view illustrating across-section taken along line A-A′ in FIG. 6A.

Referring to FIGS. 6A and 6B, a bank (Bank) may be formed on thesubstrate PI of the display panel. The substrate PI may include aflexible material. The substrate PI may include polyamide. In the bank(Bank), grooves having a constant height may be formed, and an organiclight-emitting layer may be disposed in each of the grooves. Inaddition, the bank (Bank) having an organic light-emitting layer formedtherein may be called a light emitting layer. The organic light-emittinglayer may include a red organic light-emitting layer 111R emitting redlight, a green organic light-emitting layer 111G emitting green light,and a blue organic light-emitting layer 111B emitting blue light. Thered organic light-emitting layer 111R, the green organic light-emittinglayer 111G, and the blue organic light-emitting layer 111B maycorrespond to sub-pixels, respectively. In addition, the area in theorganic light-emitting layer is formed in the bank (Bank), may be calleda light-emitting area, and the region in which the organiclight-emitting layer is not formed, may be called a non-light-emittingarea.

A plurality of data lines DL extending in a first direction may bearranged on the substrate PI. The plurality of data lines DL may bedisposed under the bank (Bank) and may be formed using a source drainmetal. Although not illustrated here, a plurality of gate linesextending in a second direction and intersecting the plurality of datalines DL may be disposed on the substrate PI. However, the presentdisclosure is not limited thereto, and a plurality of gate linesextending in the first direction and a plurality of data lines DLextending in the second direction may be disposed on the substrate PI.In addition, the plurality of data lines DL may be connected to thedisplay driver 140 a.

In addition, a cathode electrode may be formed on the bank (Bank).Further, a sealing substrate (Encap) may be formed on the cathodeelectrode (Cathode).

FIG. 7A is a conceptual view illustrating an arrangement of touch wiringlines disposed on a sealing substrate in a display device according toaspects of the present disclosure, and FIG. 7B is a cross-sectional viewillustrating a cross-section taken along line A-A′ in FIG. 7A.

Referring to FIGS. 7A and 7B, touch wiring lines TL may be formed on thesealing substrate (Encap). The touch wiring lines TL may transmit atouch signal in the first direction, and may be alternately extend inthe second direction and the third direction, which have a predeterminedangle with the first direction in an area.

Further, the touch wiring lines TL may be disposed on the bank (Bank) soas to be connected to the non-light-emitting area.

In addition, in order to prevent the sealing substrate (Encap) when thetouch wiring lines TL are formed, a touch buffer layer (T.buffer) may beformed on the sealing substrate (Encap) and then the touch wiring linesTL may be formed thereon.

In addition, the touch wiring lines TL may be connected to the touchdriver 140 b. When the touch wiring lines TL are disposed as describedabove, the number of required touch wiring numbers may correspond to ahalf of the number of data lines. Therefore, it is possible to reducethe number of data wiring lines TL. In addition, since the number ofdata wiring lines TL is reduced, it is possible to reduce the magnitudeof the parasitic capacitance formed between the data wiring lines TL andthe touch wiring lines TL.

FIG. 8A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure, and FIG. 8B is a cross-sectionalview illustrating a cross-section taken along line A-A′ in FIG. 8A.

Referring to FIGS. 8A and 8B, a touch insulating film ILD may be formedon the touch wiring lines TL, and a touch electrode TE may be formed onthe touch insulating film ILD. The touch electrode TE may include aplurality of electrode lines, which may include a plurality of firsttouch electrode lines TEL1 arranged in the second direction and aplurality of second touch electrode lines TEL2 arranged in the thirddirection. In addition, the first touch electrode lines TEL1 and thesecond touch electrode lines TEL2 may partially overlap the touch wiringlines TL, which are disposed therebelow.

In addition, one touch wiring line TL may be arranged to overlap thefirst touch electrode lines TEL1 in the second direction and to overlapthe second touch electrode lines TEL2 in the third direction. The touchelectrode TE and the touch wiring lines TL may be contacted through atleast one contact hole formed in the touch insulating film ILD in atleast one area. It is illustrated that the number of contact holes isthree. However, this is illustrative, and the present disclosure is notlimited thereto.

The touch electrode TE may include a mesh shape having a plurality ofopenings formed by intersecting a plurality of first touch electrodelines TEL1 and a plurality of second touch electrode lines TEL2.Light-emitting areas of the bank (Bank) may be formed corresponding tothe openings.

In addition, a passivation layer (passi) protecting the touch electrodemay be formed on the touch electrode lines TEL. The passivation layer(passi) may be an organic film or an inorganic film.

In addition, a parasitic capacitance CP2 may be formed between the touchwiring lines TL and the touch electrode line TEL.

FIG. 9A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure, and FIG. 9B is a cross-sectionalview illustrating a cross-section taken along line A-A′ in FIG. 9A.

Referring to FIGS. 9A and 9B, a touch insulating film ILD may be formedon the touch wiring lines TL, and a touch electrode TE may be formed onthe touch insulating film ILD. The touch electrodes TE may includetransparent electrodes. The transparent electrode may be formed ofIndium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). However, the presentdisclosure is not limited thereto. When the touch electrodes TE includetransparent electrodes, separate openings are not required for the touchelectrodes TE, and the touch electrodes is not required to have aspecial shape.

The touch electrode TE and the touch wiring lines TL may be contactedthrough at least one contact hole formed in the touch insulating filmILD in at least one area.

FIG. 10A is a conceptual view illustrating an arrangement of touchwiring lines disposed on a sealing substrate in a display deviceaccording to aspects of the present disclosure, and FIG. 10B is across-sectional view illustrating a cross-section taken along line A-A′in FIG. 10A.

Referring to FIGS. 10A and 10B, a plurality of touch wiring lines TL maybe formed on a sealing substrate (Encap). One touch wiring line TL mayextend in the first direction and is capable of transmitting a touchsignal.

Further, the touch wiring line TL may be disposed on the light-emittinglayer and between two adjacent data lines.

In addition, in order to prevent the sealing substrate (Encap) when thetouch wiring lines TL are formed, a touch buffer layer (T.buffer) may beformed on the sealing substrate (Encap) and then the touch wiring linesTL may be formed thereon.

In addition, the touch wiring lines TL may be connected to the touchdriver 140 b.

FIG. 11A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure, and FIG. 11B is a cross-sectionalview illustrating a cross-section taken along line A-A′ in FIG. 11A.

Referring to FIGS. 11A and 11B, a touch insulating film ILD may beformed on the touch wiring lines TL, and a touch electrode TE may beformed on the touch insulating film ILD. The touch electrode TE mayinclude a plurality of electrode lines, which may include a plurality offirst touch electrode lines TEL1 arranged in the second direction and aplurality of second touch electrode lines TEL2 arranged in the thirddirection. The first touch electrode lines TEL1 and the second touchelectrode lines TEL2 may be overlapped each other. In addition, thefirst touch electrode lines TEL1 and the second touch electrode linesTEL2 may overlap a touch wiring line TL disposed therebelow in a portionwhere the first touch electrode lines TEL1 and the second touchelectrode lines TEL2 are overlapped each other.

A contact hole is formed in a portion where the first touch electrodeline TEL1 and the second touch electrode line TEL2 are overlapped eachother and the first touch electrode line TEL1 and the second touchelectrode line TEL2 may be connected to the touch wiring line TLdisposed therebelow. It is illustrated that the number of contact holesis three. However, this is illustrative, and the present disclosure isnot limited thereto.

The touch electrode TE may include a mesh shape having a plurality ofopenings formed by intersecting a plurality of first touch electrodelines TEL1 and a plurality of second touch electrode lines TEL2.Light-emitting areas of the bank (Bank) may be formed corresponding tothe openings.

In addition, a passivation layer (passi) protecting the touch electrodemay be formed on the touch electrode lines TEL. The passivation layer(passi) may be an organic film or an inorganic film. In addition, aparasitic capacitance CP2 may be formed between the touch wiring linesTL and the touch electrode line TEL.

As described above, since the touch wiring line TL overlaps the firsttouch electrode line TEL1 and the second touch electrode line TEL2 onlyat the portion where the first touch electrode line TEL1 and the secondtouch electrode line TEL2 are overlapped each other, the size of theoverlap area of the touch wiring line TL with the first touch electrodeline TEL1 and the second touch electrode line TEL2 is small, so that theparasitic capacitance CP2 formed between the touch wiring line TL andthe first touch electrode line TEL1 and the second touch electrode lineTEL2 can be implemented to have a small magnitude. Therefore, the powerconsumption can be reduced.

FIG. 12A is a conceptual view illustrating an arrangement of touchelectrodes disposed on touch wiring lines in a display device accordingto aspects of the present disclosure, and FIG. 12B is a cross-sectionalview illustrating a cross-section taken along line A-A′ in FIG. 12A.

Referring to FIGS. 12A and 12B, a touch insulating film ILD may beformed on the touch wiring lines TL, and a touch electrode TE may beformed on the touch insulating film ILD. The touch electrodes TE mayinclude transparent electrodes. The transparent electrode may be formedof Indium Tin Oxide (TIN) or Indium Zinc Oxide (IZO). However, thepresent disclosure is not limited thereto. When the touch electrodes TEinclude transparent electrodes, separate openings are not required forthe touch electrodes TE, and the touch electrodes are not required tohave a special shape.

The touch electrode TE and the touch wiring lines TL may be contactedthrough at least one contact hole formed in the touch insulating filmILD in at least one area.

FIG. 13 is a flowchart illustrating a method of manufacturing a displaydevice according to aspects of the present disclosure.

Referring to FIG. 13, in the method of manufacturing a display device, aplurality of data lines and a plurality of gate lines intersecting eachother may be formed, and the plurality of data lines or the plurality ofgate lines may be arranged in a first direction (S1010). The firstdirection may be a direction in which the display driver illustrated inFIG. 1 is oriented. In addition, a plurality of gate lines may beformed, then an insulating film may be deposited thereon, and aplurality of data lines may be formed thereon. Then, a flattening filmmay be formed on thereon, then the flattening may be patterned to forman anode electrode, and then a light-emitting layer including an organiclight-emitting layer on the flattening film on which the anode electrodeis formed. At this time, the light-emitting layer may include aplurality of light-emitting areas in which an organic light-emittingfilm is formed and a non-light-emitting area in which no light-emittingarea is formed. The light-emitting layer includes a bank having aplurality of grooves formed therein, and the organic light-emitting filmmay be disposed in the grooves of the bank. In addition, a cathodeelectrode may be formed on the light-emitting layer. Further, a sealingsubstrate may be formed to protect the light emitting layer.

A plurality of touch wiring lines are formed on the data lines and thegate lines in such a manner that, among the plurality of touch wiringlines, at least one touch wiring line is disposed in the first directionbetween two adjacent data lines or between two adjacent gate lines(S1010). Further, the touch wiring lines may extend in the firstdirection along the light-emitting area of the light emitting layer. Thesealing substrate may be damaged when the touch wiring lines are formed.Thus, in order to prevent the sealing substrate from being damaged, thetouch wiring lines may be formed after a touch buffer layer is formed onthe sealing substrate.

A touch electrode may be formed on at least one touch wiring line amongthe plurality of touch wiring lines (S1030). A touch insulating film maybe formed on the touch wiring lines and a touch electrode may be formedon the touch insulating film. The touch electrode may include a meshshape including a plurality of openings formed by intersecting a firsttouch electrode line and the plurality of second touch electrode lines.Further, the openings may be formed corresponding to the light-emittinglayer. The wording “the openings correspond to the light emitting layer”may mean that the openings are formed at positions where the openingsoverlap the light emitting layer. In addition, the first touch electrodeline may extend in a second direction having a predetermined angle withthe first direction in which the touch wiring lines extend, and thesecond touch electrode lines may extend in a third direction differentfrom the second direction.

The touch wiring line may be arranged to overlap a portion where thefirst touch electrode line and the plurality of second touch electrodelines intersect each other. Accordingly, it is possible to reduce themagnitude of a parasitic capacitance between the touch wiring line andthe first touch electrode line and/or the plurality of second touchelectrode lines.

Further, the touch electrodes may include transparent electrodes. Whenthe touch electrodes include transparent electrodes, it is not necessaryto form separate openings.

In addition, the touch electrodes and the touch wiring lines may be incontact with each other through a contact hole in at least one area. Thecontact hole is formed in the touch insulating film, and the touchelectrode and the touch wiring line may be connected each other throughthe touch insulating film. The contact hole may be formed at theintersection of the first touch electrode line and the plurality ofsecond touch electrode lines.

The above description and the accompanying drawings provide an exampleof the technical idea of the present disclosure for illustrativepurposes only. Those having ordinary knowledge in the technical field,to which the present disclosure pertains, will appreciate that variousmodifications and changes in form, such as combination, separation,substitution, and change of a configuration, are possible withoutdeparting from the essential features of the present disclosure.Therefore, the aspects disclosed in the present disclosure are intendedto illustrate the scope of the technical idea of the present disclosure,and the scope of the present disclosure is not limited by the aspect.The scope of the present disclosure shall be construed on the basis ofthe accompanying claims in such a manner that all of the technical ideasincluded within the scope equivalent to the claims belong to the presentdisclosure.

What is claimed is:
 1. A display device comprising: a light-emittinglayer including a plurality of light-emitting areas; an encapsulationlayer disposed on the light-emitting layer; a touch buffer layerdisposed on a sealing substrate; a plurality of touch wiring linesdisposed on the touch buffer layer and arranged in a first direction andoverlapping with the light-emitting area; and a touch electrode disposedon the plurality of touch wiring lines, wherein the plurality of touchwiring lines is connected to the touch electrode-through a contact holedisposed at a portion where one of the touch wiring lines overlaps withthe touch electrode.
 2. The display device of claim 1, furthercomprising a plurality of data lines and a plurality of gate linesdisposed under the light emitting layer and intersecting each other,wherein the plurality data lines or the plurality gate lines extend inthe first direction.
 3. The display device of claim 2, wherein the touchelectrode includes a plurality of first touch electrode lines and aplurality of second touch electrode lines, wherein the plurality offirst touch electrode lines extends in a second direction having apredetermined angle with respect to the first direction, and theplurality of second touch electrode lines extends in a third directiondifferent from the second direction.
 4. The display device of claim 3,wherein the plurality of touch wiring lines is connected to theplurality of first touch electrode lines and the plurality of secondtouch electrode lines through the contact hole disposed at a portionwhere the plurality of first touch electrode lines and the plurality ofsecond touch electrode lines overlap each other.
 5. The display deviceof claim 1, wherein the touch electrode includes a transparentelectrode.
 6. The display device of claim 1, wherein at least one of theplurality of touch wiring lines is disposed on two data lines.
 7. Thedisplay device of claim 1, wherein at least one of the plurality oftouch wiring lines is disposed on two data lines.
 8. A display devicecomprising: a light-emitting layer including a plurality oflight-emitting areas and a non-light-emitting area disposed between thelight-emitting areas; an encapsulation layer disposed on thelight-emitting layer; a touch buffer layer disposed on a sealingsubstrate; a plurality of touch wiring lines disposed on the touchbuffer layer and arranged on the light emitting layer and connected tothe non-light-emitting area; and a touch electrode disposed on at leastone of the plurality of touch wiring lines, wherein the plurality oftouch wiring lines is connected to the touch electrode-through a contacthole disposed at a portion where one of the touch wiring lines overlapswith the touch electrode.
 9. The display device of claim 8, wherein thetouch electrode includes a mesh shape including a plurality of openingsformed by intersecting a plurality of first touch electrode lines and aplurality of second touch electrode lines, wherein the plurality ofopenings is disposed to correspond to the light emitting layer.
 10. Thedisplay device of claim 9, wherein the plurality of first touchelectrode lines and the plurality of second touch electrode lines aredisposed in the non-light emitting area and the plurality of first touchelectrode lines is arranged to partially overlap the plurality of touchwiring lines.
 11. The display device of claim 8, wherein the touchelectrode includes a transparent electrode.
 12. The display device ofclaim 8, wherein the touch electrode and the plurality of touch wiringlines are in contact through a contact hole in at least one area.
 13. Amethod of manufacturing a display device, the method comprising: forminga plurality of data lines and a plurality of gate lines intersectingeach other, wherein the plurality of data lines or the plurality of gatelines is arranged in a first direction; disposing a light emitting layeron the plurality of data lines and the plurality of gate lines;disposing an encapsulation layer on the light emitting layer; disposinga touch buffer layer on a sealing substrate; disposing a plurality oftouch wiring lines on the touch buffer layer, wherein at least one touchwiring line among the plurality of touch wiring lines is disposed in thefirst direction between two adjacent data lines or between two adjacentgate lines; and disposing a touch electrode disposed on at least onetouch wiring line among the plurality of touch wiring lines, wherein theplurality of touch wiring lines is connected to the touchelectrode-through a contact hole disposed at a portion where one of thetouch wiring lines overlaps with the touch electrode.
 14. The method ofclaim 13, wherein the touch electrode includes a mesh shape including aplurality of openings formed by intersecting the plurality of firsttouch electrode lines and the plurality of second touch electrode lines,wherein the plurality of openings is disposed to correspond to the lightemitting layer.
 15. A display device comprising: a light-emitting layerincluding a plurality of light-emitting areas; an encapsulation layerdisposed on the light-emitting layer; a touch buffer layer disposed on asealing substrate; a plurality of touch wiring lines disposed on thetouch buffer layer and arranged in a first direction and overlapping thelight-emitting area; and a plurality of first touch electrode lines andplurality of second touch electrode lines disposed on the plurality oftouch wiring lines, wherein the plurality of first touch electrode linesextends in a second direction and the plurality of second touchelectrode lines extends in a third direction, wherein the plurality oftouch wiring lines is connected to the plurality of first touchelectrode lines and the plurality of second touch electrode linesthrough a contact hole disposed at a portion where the plurality offirst touch electrode lines and the plurality of second touch electrodelines overlaps with each other.
 16. The display device of claim 15,wherein the pluralities of first and second touch electrode linesinclude a transparent electrode.
 17. The display device of claim 15,further comprising a sealing substrate disposed between thelight-emitting layer and the plurality of touch wiring lines.
 18. Thedisplay device of claim 15, wherein the first, second and thirddirections are different from one another.